(19)
(11) EP 0 361 043 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.06.1991 Bulletin 1991/25

(43) Date of publication A2:
04.04.1990 Bulletin 1990/14

(21) Application number: 89114745.6

(22) Date of filing: 09.08.1989
(51) International Patent Classification (IPC)5B29C 45/27, B23P 15/00
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 30.09.1988 CA 578973

(71) Applicant: Gellert, Jobst Ulrich
Georgetown Ontario L7G 2X1 (CA)

(72) Inventor:
  • Gellert, Jobst Ulrich
    Georgetown Ontario L7G 2X1 (CA)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) Injection molding nozzle having nose portion with heating element encircling the bore and method


    (57) An integral sprue gated injection molding nozzle (10) and method having a melt bore (38) extending centrally therethrough wherein a circular forward end portion (100) of the electrical heating element (68) encircles the melt bore (38) in the nose portion (24) to provide additional heat adjacent the gate (42). The method includes locating the circular portion (100) of the heating element (68) in a circumferential space (172) between a hub member (146) and a funnel member (120) and integrally brazing them together in a vacuum furnace to form the nose portion (24) of the nozzle. The nose portion (24) is drilled and machined to provide the desired gate (42) and configuration depending upon the particular application.







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